Clean Water Act discharge permit · NPDES TX0130036
SHELDON ROAD SOUTH WWTP, Houston, TX: NPDES TX0130036 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 38Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
SHELDON ROAD SOUTH WWTP, held by NATIONAL OILWELL VARCO, L.P., holds NPDES permit TX0130036, which discharges to Hcfcd Ditch X2;Muleshoe Lk Portion San Jacinto Riv. EPA’s file records it issued July 31, 2018 and expiring July 31, 2023.
SHELDON ROAD SOUTH WWTP, Houston, Texas: Individual permit TX0130036, held by NATIONAL OILWELL VARCO, L.P.; Administratively continued (past its expiration date and still in force until reissued); issued July 31, 2018, term to July 31, 2023; discharges to HCFCD DITCH X2;MULESHOE LK PORTION SAN JACINTO RIV.
- Solids, total suspended: 3 limits, 34 violations of any kind, 10 effluent exceedances, latest February 28, 2023, largest 71% over the limit.
- E. coli: 2 limits, 6 violations of any kind, 4 effluent exceedances, latest September 30, 2017, largest 1,022% over the limit.
- Chlorine, total residual: 2 limits, 20 violations of any kind, 3 effluent exceedances, latest October 31, 2020, largest 173% over the limit.
- Nitrogen, ammonia total [as N]: 3 limits, 25 violations of any kind, 1 effluent exceedance, latest January 31, 2015, largest 7% over the limit.
- pH: 3 limits, 22 violations of any kind, 1 effluent exceedance, latest November 30, 2011.
- Oxygen, dissolved [DO]: 1 limit, 9 violations of any kind, 1 effluent exceedance, latest June 30, 2018, largest 3% over the limit.
- Arsenic, dry weight: 5 limits, 25 violations of any kind, 0 effluent exceedances.
- Chromium, sludge, total, dry weight [as Cr]: 5 limits, 25 violations of any kind, 0 effluent exceedances.
- BOD, carbonaceous [5 day, 20 C]: 3 limits, 24 violations of any kind, 0 effluent exceedances.
- Flow, in conduit or thru treatment plant: 2 limits, 18 violations of any kind, 0 effluent exceedances.
- Selenium, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Copper, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Cadmium, dry weight: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Molybdenum, sludge, total, dry weight [as Mo]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Zinc, sludge, total, dry weight [as Zn]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Lead, sludge, total, dry weight [as Pb]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Nickel, sludge, total, dry weight [as Ni]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Mercury, sludge, total, dry weight [as Hg]: 3 limits, 15 violations of any kind, 0 effluent exceedances.
- Nickel, total [as Ni]: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Level of pathogen requirements achieved: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Description of pathogen option used: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Vector attraction reduction alternative used: 2 limits, 10 violations of any kind, 0 effluent exceedances.
- Fecal coliform: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Toxicity characteristic leaching procedure: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Unit w/liner/leachate collection system: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Boundary areas: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Salmonella: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Pollutant table from 503.13: 1 limit, 5 violations of any kind, 0 effluent exceedances.
- Polychlorinated biphenyls [PCBs]: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge disposed in landfill: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Annual amt sludge transported interstate: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Compliance w/part 258 sludge requirement: 1 limit, 4 violations of any kind, 0 effluent exceedances.
- Ann. amt sludge disposed by other method: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt of sludge incinerated: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual sludge production, total: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amount of sludge land applied: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual amt. sludge disposed surface unit: 1 limit, 3 violations of any kind, 0 effluent exceedances.
- Annual whole sludge application rate: 1 limit, 0 violations of any kind, 0 effluent exceedances.
- January 30, 2024: Permit Violations - Violation Specified in Comment (ST6).
Other permits held by NATIONAL OILWELL VARCO, L.P.
- WEST LITTLE YORK COARING PLANT, Houston: TX0075370, issued August 24, 2007
- TUBOSCOPE SHELDON ROAD NORTH WWTP, Houston: TX0087491, issued July 31, 2018
SHELDON ROAD SOUTH WWTP among its neighbors
EPA’s permit file holds 112 discharge permits in the Carpenters Bayou subwatershed (HUC 120401040702), TX0130036 among them. Its county holds 4,455, 195 of them major permits; TX0130036 is a minor permit.
Other permits in the Carpenters Bayou subwatershed (HUC 120401040702)
- 683 LF SANITARY SEWER FACILITIES ALONG WHOUSTON LAKE PKWY, Houston: TXR1523WG, minor permit, discharging to GREENS BAYOU, permit term to March 4, 2028
- AMERICAN PALLET RECYCLING, Houston: TXR05FX71, minor permit, permit term to August 13, 2026
- AXIS INDUSTRIES GARRETT ROAD, Houston: TXR05GC60, minor permit, permit term to August 13, 2026
- BATTLEGROUND MATERIALS, Houston: TXR05HC33, minor permit, permit term to August 13, 2026
- CARPENTERS BAYOU TRAIL AND PEDESTIRAN BIKE BRIDGE, Houston: TXR1511RZ, minor permit, discharging to CARPENTERS BAYOU, permit term to March 4, 2028
- CARPENTERS LANDING EAST, Channelview: TXR1566QX, minor permit, discharging to CARPENTERS BAYOU, permit term to March 4, 2028
- CARPENTERS LOGISTICS CENTER WWTF, Channelview: TX0145653, not classed
- CE KING 66.72-ACRES, Houston: TXR1504ML, minor permit, discharging to SHELDON RESERVOIR, permit term to March 4, 2028
- CHANNELVIEW CBP, Channelview: TXG113073, minor permit, permit term to November 6, 2026
- CHANNELVIEW TERMINAL, Channelview: TX0136573, minor permit, discharging to CARPENTERS BAYOU TIDAL IN HSC, permit term to October 4, 2023
Identity
| Facility as filed | SHELDON ROAD SOUTH WWTP |
|---|---|
| Permittee as filed | NATIONAL OILWELL VARCO, L.P. |
| NPDES ID | TX0130036 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 31, 2018 |
| Expiration date | July 31, 2023 |
| Address | Houston, TX 77049 |
| Receiving water | HCFCD DITCH X2;MULESHOE LK PORTION SAN JACINTO RIV |
| Subwatershed | Carpenters Bayou (HUC 120401040702) |
| SIC | 1389 – Oil And Gas Field Services |
Effluent limits and exceedances
- 38Pollutants on file
- 38Under a numeric limit
- 37With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 3 | 34 | 10 | February 28, 2023 | 71% over the limit |
| E. coli | 2 | 6 | 4 | September 30, 2017 | 1,022% over the limit |
| Chlorine, total residual | 2 | 20 | 3 | October 31, 2020 | 173% over the limit |
| Nitrogen, ammonia total [as N] | 3 | 25 | 1 | January 31, 2015 | 7% over the limit |
| pH | 3 | 22 | 1 | November 30, 2011 | |
| Oxygen, dissolved [DO] | 1 | 9 | 1 | June 30, 2018 | 3% over the limit |
| Arsenic, dry weight | 5 | 25 | 0 | ||
| Chromium, sludge, total, dry weight [as Cr] | 5 | 25 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 3 | 24 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 18 | 0 | ||
| Selenium, dry weight | 3 | 15 | 0 | ||
| Copper, dry weight | 3 | 15 | 0 | ||
| Cadmium, dry weight | 3 | 15 | 0 | ||
| Molybdenum, sludge, total, dry weight [as Mo] | 3 | 15 | 0 | ||
| Zinc, sludge, total, dry weight [as Zn] | 3 | 15 | 0 | ||
| Lead, sludge, total, dry weight [as Pb] | 3 | 15 | 0 | ||
| Nickel, sludge, total, dry weight [as Ni] | 3 | 15 | 0 | ||
| Mercury, sludge, total, dry weight [as Hg] | 3 | 15 | 0 | ||
| Nickel, total [as Ni] | 2 | 10 | 0 | ||
| Level of pathogen requirements achieved | 2 | 10 | 0 | ||
| Description of pathogen option used | 2 | 10 | 0 | ||
| Vector attraction reduction alternative used | 2 | 10 | 0 | ||
| Fecal coliform | 1 | 5 | 0 | ||
| Toxicity characteristic leaching procedure | 1 | 5 | 0 | ||
| Unit w/liner/leachate collection system | 1 | 5 | 0 | ||
| Boundary areas | 1 | 5 | 0 | ||
| Salmonella | 1 | 5 | 0 | ||
| Pollutant table from 503.13 | 1 | 5 | 0 | ||
| Polychlorinated biphenyls [PCBs] | 1 | 4 | 0 | ||
| Annual amt sludge disposed in landfill | 1 | 4 | 0 | ||
| Annual amt sludge transported interstate | 1 | 4 | 0 | ||
| Compliance w/part 258 sludge requirement | 1 | 4 | 0 | ||
| Ann. amt sludge disposed by other method | 1 | 3 | 0 | ||
| Annual amt of sludge incinerated | 1 | 3 | 0 | ||
| Annual sludge production, total | 1 | 3 | 0 | ||
| Annual amount of sludge land applied | 1 | 3 | 0 | ||
| Annual amt. sludge disposed surface unit | 1 | 3 | 0 | ||
| Annual whole sludge application rate | 1 | 0 | 0 |
Inspections, violations and enforcement
- 1Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 30, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
Inspections
EPA’s inspection file holds no inspection for NPDES TX0130036.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES TX0130036.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.